Wristwatch



FIG. 1 is a right front perspective view of a wristwatch showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The structural features depicted by broken lines in FIG. 3 have been shown for the purpose of illustrating portions of the wristwatch that form no part of the claimed design. 

CLAIM The ornamental design for a wristwatch, as shown and described. 